US President Barack Obama is troubled by Syria's behavior but is hoping for progress in boosting ties with Damascus.
In an interview to be screened Sunday on Sky News, Obama was asked by the British television channel if he would accept an invitation for direct talks with Syrian President Bashar Assad in Damascus.
"We've started to see some diplomatic contacts between the United States and Syria," Obama said in the interview recorded during his visit to Ghana on Saturday.
"There are aspects of Syrian behavior that trouble us and we think that there is a way that Syria can be much more constructive on a whole host of these issues.
"But, as you know, I'm a believer in engagement and my hope is that we can continue to see progress on that front," Obama said.